1147- Jews of Wurtzburg were massacred by the Crusaders.
1283- Jews of Mayence, Germany, were massacred.
February 25, 1451-Pope Nicholas V banned all social contact between Christians and Jews. The Church sought to stop Christian converts to Judaism; throughout Europe, those who did so were liable to the death penalty.
1503- Jews of Lithuania were granted permission to return to the country after an exile of 8 years.
1799- Lorenzo Bertran subjected to an auto-da-fe in Seville, Hy"d. He was the last person to be punished for Judaizing in Spain.
1817- Czar Alexander I of Russia declared the Blood Libel - the infamous accusation that Jews murdered Christian children to use their blood in baking matzah for Pesach / Passover, for which thousands of Jews were massacred through the centuries - to be false. (Nevertheless, nearly a hundred years later the accusation was officially leveled against Mendel Beilis in Kiev)
1856- Jews of White Russia were forbidden to wear distinctive clothes which would set them apart from the rest of the population.
1886- First organized Arab assault on a Jewish settlement, Petach Tikva.
1918- Jews of Gluchor were massacred by Ukrainian mob.
March 15, 1939- German troops marched into Prague.
March 19, 1944- Germany occupied Hungary.